The Tidewright Journal
Encyclopedia entries, coastal atlas guides, science explainers, farming know-how and recipes — written by Tidewright’s scientists, engineers, chefs and field crews, and open to everyone.
How to evaluate a seaweed farm site: the physical criteria that decide your crop, the water quality checks, and the social map of neighbours and rules.
Naomi Reyes ·
A Tidewright field note from California's north coast: two weeks inside a purple urchin barren, counting what kelp loss looks like and planning its way back.
Jack Callum ·
What settles on an urchin barren, and what survives? We bolted ceramic settlement plates to Mendocino reef to find out — before and after seeding.
Jack Callum ·
A Tidewright field note from Maria Island, Tasmania: deploying Holdfast seed lines onto heat-struck reef at dawn, and what we found three months on.
Jack Callum ·
Seven months after seeding, the first kelp canopy breaks the surface at Stumpy's Bay. Tidewright's crew logs the milestone — and what it actually means.
Jack Callum ·
Tr L-7 is a single 30-metre transect off Tasmania surveyed every month since 2021. Five years of unglamorous re-measurement turned out to be our sharpest instrument.
Jack Callum ·
Freediving a kelp forest is the purest way to meet the reef. Learn blackout-safe practice, one-up-one-down buddying, and etiquette for breath-hold diving in kelp.
Tom Okafor ·
Galicia's drowned river valleys mix upwelled Atlantic riches with a foraging culture older than Spain's seaweed industry. A guide to the rías and their kelp.
Sofia Andersson ·
Meet the garibaldi, California's blazing orange state marine fish — a fiercely territorial damselfish that gardens algae on the kelp forest floor.
Dr. Theo Nakamura ·
The giant green anemone is a solar-powered predator of Pacific tidepools and kelp-forest edges. Its biology, symbiosis and decades-long life.
Dr. Mara Ellison ·
The gumboot chiton is the world's largest chiton — a hand-long, magnetite-toothed grazer nicknamed the wandering meatloaf. Meet the kelp coast's gentle giant.
Dr. Theo Nakamura ·
Kombu farming is a century-old Japanese craft: forced cultivation, floating rafts, staggered harvests and sun-drying discipline, explained for growers.
Naomi Reyes ·
How to grow sugar kelp (Saccharina latissima) from spores to harvest — site choice, seeding windows, grow-out depth, and the winter timing that makes this crop work.
Naomi Reyes ·
Ninety kilometres of black ocean off northern British Columbia, an archipelago of giant kelp, ancient villages and Haida co-management — kelp country at its most sovereign.
Dr. Mara Ellison ·
The harbour seal is the temperate kelp coast's most widespread pinniped — a shy true seal found from California to the Baltic. Facts, ecology and how to watch them.
Dr. Mara Ellison ·
When should you harvest kelp? How the biomass-versus-quality trade-off works, species-by-species seasons, and the sampling routine that catches the peak.
Naomi Reyes ·
A mains failure at 2 a.m. puts a Tasmanian kelp hatchery's season on a countdown. Field notes on triage, generators and the order in which things die.
Jack Callum ·
The working numbers of a kelp hatchery — temperature, salinity, pH, nutrients, filtration and dosing math — and what to do when each one drifts.
Naomi Reyes ·
Kelp has no true roots — its holdfast is a branching biological anchor built for storms. Explore holdfast anatomy, how kelp really feeds, and its hidden biodiversity.
Dr. Theo Nakamura ·
Furikake turns plain rice into a meal in one shake. Make your own seaweed furikake from nori, kombu or wakame — with recipes, ratios and storage tips.
Sofia Andersson ·
Kelp grows as fast as any forest on Earth, but where does its carbon actually go? The genuine science, the real sinks and the honest uncertainties.
Dr. Mara Ellison ·
A step-by-step guide to becoming a marine biologist — which degrees matter, the field skills that hire, what first jobs pay, and the mistakes to avoid along the way.
Dr. Theo Nakamura ·
A design guide for integrated multi-trophic aquaculture: the nutrient mass balance, how to pair fish, shellfish and seaweed, and how to lay out the water.
Naomi Reyes ·
IMTA pairs kelp and shellfish with fed fish farms so waste nutrients become crops. How integrated multi-trophic aquaculture works, its benefits and its limits.
Naomi Reyes ·